Here's something I just learned about; a Portuguese Discoveries Theme Pack for Windows XP. As the download page http://www.microsoft.com/globaldev/outreach/dnloads/discover-pt.mspx puts it:
Show your pride in Portuguese culture! The Portugese Discoveries Theme Pack features wallpapers, icons, mouse pointers and color schemes dedicated to the period of Portuguese Discoveries. It was produced by Microsoft Corp. in cooperation with the National Library - Ministry of Culture, for Microsoft customers in Portugal. Download and install it now.
Why not try it out..?
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